You've got far more Haskell experience than I do, but I have done some pretty heavy refactoring on large java codebases. The process always seemed to be, tease

You've got far more Haskell experience than I do, but I have done some pretty heavy refactoring on large java codebases. The process always seemed to be, tease out some interfaces and switch the implementation of those interfaces. Over and over and over. I could lean on javac and tests but some knots are hard to untangle and take a long time. I believe you that the in the large it's still hard. It seems so much more pleasant day to day untangling that big ball of string with Haskell rather than Java.